VideoCompressOnline
100% Client-Side · Videos never leave your device

Free Online Video Compressor
Fast. Private. No Upload.

Compress MP4 videos up to 90% smaller — directly in your browser. Best free video compressor for Discord, email, and social media. Up to 2 GB, no watermarks.

Drag and drop your video

MP4, WebM, MKV, MOV · Up to 2 GB

Target Size
Configure

Select the maximum file size for the output video. The compressor will adjust the bitrate to fit within this limit.

Keep the video's original framerate instead of reducing it for smaller file sizes.

Removing the audio track can save significant space on smaller files.

Private & Secure Video Compressor

Files are processed entirely in your browser using WebAssembly. Unlike other online video compressors, nothing is ever uploaded to a server.

Lightning-Fast Compression

No upload wait times. This free video compressor starts instantly — all processing happens on your device.

No Limits, No Watermarks

Compress videos up to 5 GB with no daily limits, no watermarks, and no sign-up. The best free online video compressor.

The Best Free Online Video Compressor — No Upload, No Watermark

VideoCompressOnline is a free online video compressor that lets you reduce video file size up to 90% without losing noticeable quality. Unlike traditional tools like Handbrake video compressor or desktop software, this video compressor online tool works entirely inside your browser — there is nothing to download, install, or configure. Simply drag and drop your video file and let the compression engine do the rest. Whether you need an 8MB video compressor for Discord, a 10MB video compressor for email attachments, or need to shrink a large recording by several gigabytes, VideoCompressOnline handles it all.

Why Choose This Free Video Compressor?

Most online video compressor tools require you to upload your files to remote servers and wait for processing. That means slower speeds, privacy concerns, and often file-size limits of a few hundred megabytes. VideoCompressOnline is different. It runs a full video encoding engine (powered by FFmpeg and WebAssembly) directly on your device. Your videos never leave your computer — making it the most privacy-focused free video compressor available today. There are no daily usage limits, no mandatory sign-ups, and absolutely no watermarks added to your output files.

This video compressor app supports all popular video formats including MP4, WebM, MKV, MOV, AVI, and more. It outputs universally compatible MP4 files that play perfectly on every device and platform. With support for files up to 5 GB, it is one of the most capable video compressor online free 5GB tools available — far surpassing the limits of alternatives like FreeConvert video compressor or VEED video compressor free tiers.

Video Compressor for Discord — Compress Under 8MB or 10MB Instantly

One of the most common reasons people search for a video compressor for Discord is Discord's strict file-size limit. Free Discord users can only upload files up to 8 MB, while Nitro users get a 25 MB or 50 MB limit. If you have a gameplay clip, meme video, or screen recording that's too large, this Discord video compressor makes it effortless to shrink your video below the limit. Simply set the target file size to 8 MB (or 10 MB, 25 MB — whatever you need) using the "Target a file size" compression mode, and the tool calculates the optimal bitrate automatically. The result is a perfectly sized video ready to share in your Discord server.

Advanced Compression Options — MP4 Video Compressor With Full Control

Beyond simple file-size targeting, this MP4 video compressor automatically chooses the best settings to give you full control over the output without the hassle. It uses optimized H.264 video codecs and smart CRF-based encoding to reduce file sizes by up to 90%. It ensures maximum compatibility across all devices, acting like professional tools such as Handbrake video compressor, but with zero setup required.

How It Works — Compress Video in 3 Simple Steps

  1. Upload your video — Drag and drop any MP4, WebM, MKV, or MOV file (up to 2 GB).
  2. Choose your settings — Pick a target file size (percentage or MB), select a codec, and configure audio preferences.
  3. Download the result — Your compressed video is ready in seconds. Click download and enjoy the smaller file.

Whether you are looking for a free online video compressor for everyday use, a video compressor discord tool for sharing clips with friends, or a powerful video compressor online free alternative to paid software — VideoCompressOnline delivers professional-grade results at zero cost. No installation, no account, no compromises. Start compressing your videos right now.

Frequently Asked Questions

How to compress a video without losing quality?

To compress a video without losing quality, use a smart video compressor like VideoCompressOnline that uses CRF-based encoding. CRF (Constant Rate Factor) analyzes each frame and allocates just enough data to maintain visual quality while reducing file size. Set the compression target to around 60–80% of the original size with the H.264 or H.265 codec. H.265 (HEVC) is especially effective — it can reduce file sizes by 20–75% compared to H.264 with virtually no visible quality loss. The key is to avoid aggressive bitrate reduction and let the encoder decide the optimal balance.

What video formats does the compressor work with?

VideoCompressOnline supports all major video formats including MP4, WebM, MKV, MOV, AVI, MPEG, OGG, and 3GP. You can upload any of these formats and the compressor will process them using the built-in FFmpeg engine. The compressed output is always delivered in the universally compatible MP4 format (H.264/AAC), which works on every device, browser, and social media platform including Discord, WhatsApp, Instagram, and YouTube.

How to compress a video for email attachment?

Most email providers have a 25 MB attachment limit (Gmail, Outlook, Yahoo). To compress a video for email, upload it to VideoCompressOnline, select 25 MB under Target Size (or lower, depending on your email provider). The tool will automatically calculate the optimal bitrate to fit your video within that limit.

Can I preview the compressed video size before compression?

When you use the "Target a file size" compression mode (percentage or MB), you are essentially defining the output size upfront, so you know the approximate result before compression begins. For percentage mode, if your video is 100 MB and you set 40%, the output will be approximately 40 MB. For the MB mode, the output will match your target. The actual result may vary slightly due to how video encoding works, but it will be very close to the target you set.

Is it possible to compress videos when you are not connected to the internet?

VideoCompressOnline requires an internet connection only for the initial page load, during which the WebAssembly (WASM) engine and FFmpeg core files are downloaded to your browser. Once the page is fully loaded and the engine is cached, the actual video compression happens 100% offline on your device. Your video files are never uploaded to any server. However, if you close the tab and reopen it without internet, the engine files may need to be re-downloaded. For fully offline compression, desktop tools like Handbrake are recommended.

Is it possible to compress videos on mobile devices?

Yes, VideoCompressOnline works on mobile devices including iPhones, iPads, and Android phones. Since it runs entirely in the browser using WebAssembly, there is no app to install. Simply open the website in Chrome, Safari, or Firefox on your mobile device, upload your video, and compress it. Keep in mind that mobile devices have less RAM and processing power than desktops, so very large files (over 500 MB–1 GB) may be slow or cause the browser to run out of memory. For best results on mobile, compress smaller video clips.

Is it possible to decompress a compressed video and obtain its original quality?

No, video compression is a lossy process — meaning some data is permanently discarded to reduce file size. Once a video is compressed, the removed data cannot be recovered. This is true for all video compressors, not just VideoCompressOnline. That is why it is important to always keep a backup of your original video file before compressing. If you need the original quality later, you will need to go back to your original uncompressed source file.

Which encoder is best for compressing video?

The two most popular encoders are H.264 (AVC) and H.265 (HEVC). H.264 is the most widely compatible encoder — it works on virtually every device, browser, and platform. H.265 is the newer standard that delivers 20–75% better compression ratios than H.264 at the same visual quality, making it ideal for high-resolution 4K video. For general use and maximum compatibility, H.264 is the best choice. For maximum compression with modern devices, H.265 is superior. VideoCompressOnline supports both encoders so you can choose based on your needs.